these 3 derivations will be built:
  /nix/store/cjf3v9xm5n6fz326n4df4hl01ikvrxv3-treefmt.toml.drv
  /nix/store/xfvx57m9mvw6k36wlapx0nlr8rfsnznj-treefmt.drv
  /nix/store/nr5zydpf9k5mmqr842ya2a78f5lnqkaw-treefmt-check.drv